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    Ferroelastic Fingerprints in Methylammonium Lead Iodide Perovskite

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    Type
    Article
    Authors
    Hermes, Ilka M.
    Bretschneider, Simon A.
    Bergmann, Victor W.
    Li, Dan
    Klasen, Alexander
    Mars, Julian
    Tremel, Wolfgang cc
    Laquai, Frédéric cc
    Butt, Hans-Jürgen
    Mezger, Markus
    Berger, Rüdiger
    Rodriguez, Brian J.
    Weber, Stefan A. L.
    KAUST Department
    KAUST Solar Center (KSC)
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2016-03-04
    Online Publication Date
    2016-03-04
    Print Publication Date
    2016-03-17
    Permanent link to this record
    http://hdl.handle.net/10754/596362
    
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    Abstract
    Methylammonium lead iodide (MAPbI3) perovskite materials show an outstanding performance in photovoltaic devices. However, certain material properties, especially the possible ferroic behavior, remain unclear. We observed distinct nanoscale periodic domains in the piezoresponse of MAPbI3(Cl) grains. The structure and the orientation of these striped domains indicate ferroelasticity as their origin. By correlating vertical and lateral piezoresponse force microscopy experiments performed at different sample orientations with x-ray diffraction, the preferred domain orientation was suggested to be the a1-a2-phase. The observation of these ferroelastic fingerprints appears to strongly depend on the film texture and thus the preparation route. The formation of the ferroelastic twin domains could be induced by internal strain during the cubic-tetragonal phase transition.
    Citation
    Ferroelastic Fingerprints in Methylammonium Lead Iodide Perovskite 2016 The Journal of Physical Chemistry C
    Publisher
    American Chemical Society (ACS)
    Journal
    The Journal of Physical Chemistry C
    DOI
    10.1021/acs.jpcc.5b11469
    Additional Links
    http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b11469
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.jpcc.5b11469
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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